EP2743598B1 - Apparatus and method for adjusting air pressure of room - Google Patents
Apparatus and method for adjusting air pressure of room Download PDFInfo
- Publication number
- EP2743598B1 EP2743598B1 EP13196151.8A EP13196151A EP2743598B1 EP 2743598 B1 EP2743598 B1 EP 2743598B1 EP 13196151 A EP13196151 A EP 13196151A EP 2743598 B1 EP2743598 B1 EP 2743598B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- room
- vent
- air vent
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims description 14
- 238000004887 air purification Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 description 10
- 238000009423 ventilation Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000012075 bio-oil Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0236—Ducting arrangements with ducts including air distributors, e.g. air collecting boxes with at least three openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
- F24F2011/0002—Control or safety arrangements for ventilation for admittance of outside air
- F24F2011/0005—Control or safety arrangements for ventilation for admittance of outside air to create underpressure in a room, keeping contamination inside
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Description
- The invention relates to an apparatus for adjusting air pressure of a room.
- The invention further relates to a method for adjusting air pressure of a room.
- As is well known, low-pressure devices are used on building and renovation sites to prevent dust from spreading to the surroundings of the work site.
- According to regulations, low-pressure devices must be equipped with air filters. Generally, filtration of at least HEPA H13 grade is used. Low pressure is formed by blowing the filtered air out of the work site.
- Microfiltration-generated low pressure on work sites has long been used especially on work sites where asbestos-containing structures are demolished. However, the use of microfiltration has also spread to work sites, in which stone dust, including concrete dust, is created, because all stone dust may cause a health risk. Studies show that quartz particles, for instance, correspond to asbestos in health hazards.
- Regulations concerning dust control are tightened all the time. In the renovation of public sites, in particular, the current practice is already to observe the P1 classification, according to which low pressure should be used in the work space and the air in the work space should be filtered 6 to 10 times an hour. The targeted low pressure is 8 to 10 Pa below the air pressure of the surroundings.
- The output capacity of a low-pressure air purification device handling the filtration and generating the low pressure shall naturally be calculated on the basis of the cubic volume of the space being purified. For instance, if the air volume of the site being renovated is 13 000 m3, the purification capacity needs to be at least 6 x 13 000 = 78 000 m3/h.
- A low-pressure device lowers the air pressure in the space to substantially lower than the targeted low pressure, the pressure difference may be 50 to 60 Pa, for example, in comparison to the surroundings. This may cause problems. Firstly, a big pressure difference makes air control in the space and the opening of access doors and the like difficult. Secondly, removing a large amount of air from a space may cause a very high heat loss, especially in winter. After all, warm air is removed, the replacement air of which needs to be heated. Document
US 4 841 733 A discloses a temperature and humidity control system for natatoriums. DocumentUS 2006/021375 A1 discloses an air conditioner and filtering unit producing a positive or negative pressure to create an isolation space. - The apparatus and method for adjusting the air pressure of a room according to the invention are characterised by what is disclosed in the characterising parts of the
independent claims - In the following, features of some embodiments of the invention are listed in a random order:
- The idea of an embodiment is that a control means comprises a control plate that is fastened turnably to an air distribution casing in such a manner that it can be turned in front of a second air vent. This provides the advantage that the control plate is simple to implement and provides an extensive adjustment range.
- The idea of an embodiment is that the control means is arranged to be adjusted manually and that an element reducing its motion sensitivity is arranged to it. This provides the advantage that manual adjustment can be done at low cost, and the element reducing motion sensitivity facilitates the adjustment of the apparatus.
- The idea of an embodiment is that the control means is connected to be controlled by a control unit and that the control unit is connected to a pressure difference sensor detecting pressure difference in the room and its surroundings. This provides the advantage that adjustment does not require the presence of personnel and that the pressure difference can be kept as desired all the time.
- The idea of an embodiment is that a second air vent is arranged to return air to the room and that the second air vent comprises a heater for heating the flowing air. This provides the advantage that the room can be heated by means of the returned air.
- The idea of an embodiment is that the heater comprises an electric resistor. This provides the advantage that the electric resistor provides a simple and safe means of heating air.
- The idea of an embodiment is that the apparatus comprises an air filter unit that is arranged in front of an air receive duct as seen in the flow direction, and a fan that is arranged to generate air flow through the apparatus. This provides the advantage that it is possible to take care of the adjustment of the air pressure level in the room and the filtration with the same apparatus.
- The idea of an embodiment is that the air filter unit and fan are arranged in a low-pressure air purification device and that the apparatus comprises fastening means for fastening the air receive duct detachably and in a substantially air-tight manner to the low-pressure air purification device. This provides the advantage that the apparatus can be transported in smaller units and that, if necessary, the low-pressure air purification device can be used without the apparatus.
- The idea of an embodiment is that the second air vent is equipped with a pipe output fitting that is attachable to the air duct for conveying air away from the air distribution casing. This provides the advantage that the second air vent is easily attached to the ventilation ducts of the room, for instance.
- Some embodiments of the solution are explained in more detail in the accompanying drawings, in which
-
Figure 1 is a schematic representation of an apparatus and method for adjusting the air pressure of a room, and -
Figure 2 is a schematic representation of a second apparatus and method for adjusting the air pressure of a room. - For the sake of clarity, the figures show some embodiments of the solution in a simplified manner. Like reference numerals identify like elements in the figures.
-
Figure 1 is a schematic representation of an apparatus and method for adjusting the air pressure of a room. - The
apparatus 1 is arranged in theroom 2 that is separated in a substantially air-tight manner from its surroundings with an air-tight boundary 3. Theapparatus 1 is shown by a dot-and-dash line in the figure. - In this specification, a room refers to an entity of one or more rooms or corresponding spaces, which is isolated from its surroundings in a substantially dust- and air-tight manner so that it is possible to form a pressure difference to its surroundings.
- The
boundary 3 can be made up of parts of a building, such as walls, windows, floor, ceiling, and/or material, such as plastic film, tape, temporary non-bearing wall structures, added for sealing purposes. - The
apparatus 1 comprises an air receive duct 4 arranged to receive air from theroom 2. The receive duct 4 is at its simplest an opening in the device, but may naturally also comprise a suitably dimensioned pipe portion or the like. - In the embodiment shown in
Figure 1 , the air of theroom 2 flows through a low-pressureair purification device 17 before arriving in the receive duct 4. The low-pressureair purification device 17 is described in more detail later on in this specification. - Air flows from the air receive duct 4 to an
air distribution casing 5. In addition to the air receive duct 4, also afirst air vent 6 and asecond air vent 7 are connected to theair distribution casing 5. - The
air vents air distribution casing 5 out of theapparatus 1. - The
first air vent 6 is arranged to convey air outside theroom 2, such as to an adjacent room or out of the building. Thesecond air vent 7 conveys air to theroom 2, in other words, back to the space, from which it was removed. - Both the receive duct 4 and the
air vent - A control means 8 is arranged in the
air distribution casing 5 to adjust the flow resistance of thesecond air vent 7 in relation to thefirst air vent 6. - In the embodiment shown in
Figure 1 , the control means 8 is arranged to adjust the flow surface area of thesecond air vent 7. In a second embodiment, the control means 8 is arranged to adjust the flow surface area of thefirst air vent 6, and in a third embodiment, the control means 8 is arranged to adjust the flow surface area of both the first and thesecond air vent 6. - According to an idea, the control means 8 can be arranged elsewhere than in the
air distribution casing 5, in either or bothair vents - The control means 8 now comprises a control plate or
damper 9 that is fastened to theair distribution casing 5 to be turnable in relation to thesecond air vent 7. Instead of thecontrol plate 9, a guillotine, register, rotatable valve disc or some other known air flow control means can also be used. - The
second air vent 7 can be completely closed with thecontrol plate 9, or the air flowing through it can be restricted so as to obtain the desired ratio of air flowing out of the apparatus through thedifferent air vents - In an embodiment of the apparatus and method, the position of the
control plate 9 is adjusted manually. In such a case, anelement 10 that reduces the motion sensitivity of the control plate, such as a gas spring or friction mechanism, is connected to the control plate. This prevents an uncontrolled movement of thecontrol plate 9 when thecontrol plate 9 is adjusted in a strong air flow. When the correct position of thecontrol plate 9 has been found, it is locked into this position with a suitable locking member. - In the embodiment shown in
Figure 1 , the position of thecontrol plate 9 is arranged to be adjusted by acontrol unit 11 that controls an actuator, such as an electric motor, used in turning the control plate. - The
control unit 11 may comprise a programmable logic and/or processor, for instance, that executes a computer program code downloaded into the control unit. Apressure difference sensor 12 detecting a pressure difference between theroom 2 and its surroundings is connected to thecontrol unit 11. - The
control unit 11 adjusts the position of thecontrol plate 9 in such a manner that said pressure difference remains as desired. According to an idea, the pressure in theroom 2 is approximately 8 to 10 Pa below the air pressure of the surroundings, but it should be noted that the pressure difference could also be other than this. - If the pressure difference exceeds a certain pre-set limit value, the
control unit 11 turns thecontrol plate 9 clockwise in the figure, which increases the ratio of air volume flow returning to theroom 2 in relation to the air flow volume removed from theroom 2. - If the pressure difference becomes smaller than a certain pre-set limit value, the
control unit 11 turns thecontrol plate 9 counterclockwise in the figure, which decreases the ratio of air volume flow returning to theroom 2 in relation to the airflow volume removed from theroom 2. Thus, theapparatus 1 is controlled automatically. - According to a third embodiment, the position of the
control plate 9 is changed by an actuator, such as an electric motor, that is operated by a person responsible for the adjustment of the apparatus. - Thus, the control of the
apparatus 1 can be manual or at least to some extent automatic. In a fully automatic solution, the use of the air flow controllers can be controlled on the basis of information obtained from various measuring arrangements. Said measuring arrangements can be based on measuring pressure difference, air pressure, air flow or the like. The operation of air flow control motors of theapparatus 1 is controlled by means of the measuring arrangements. According to an idea, the above-mentioned measuring arrangements are measurement sensors that are fixedly attached to the apparatus and measure pressure differences or the like through a flow pipe and thus control the air flow. The measuring and control apparatuses may also be measurement sensors or systems based on a radio signal, gsm signal or some other digital data transmission, which control the operation of the air flow control plates of the device. - It should be noted that the above alternatives for turning the
control plate 9 can also be applied to control means 8 of other type. - The
apparatus 1 can be equipped with aheating device 13 to heat the air flowing in thesecond air vent 7. In the embodiment shown inFigure 1 , theheating device 13 comprises anelectric resistor 14, but it is also possible to use a heat exchanger connected to the water circulation, an oil- or gas-operated heater or a heater utilizing wood- or plant-based energy, such as a wood, pellet, chip or bio-oil heater. - The
apparatus 1 is connected to a low-pressureair purification device 17 that comprises anair filter unit 15, through which air removed from theroom 2 flow into theapparatus 1. Theair filter unit 15 may comprise one or more filter elements arranged in series. In an embodiment, theair filter unit 15 comprises a filter element of HEPA H13-grade or higher. - The low-pressure
air purification device 17 also comprises afan 16 that produces an air flow required in the operation of theapparatus 1 and low-pressure purification device 17. Thefan 16 is typically an electric fan. The capacity of thefan 16 is dimensioned to achieve the necessary air flow. According to an idea, the capacity is enough to filter theroom 2air 6 to 10 times an hour. The replacement air of theroom 2 can be taken from outside the building or inside the building, but outside theroom 2. The present invention brings about an especially big cost saving during the heating period, because the amount of cold replacement air from outdoors can be reduced. In addition, this provides the advantage that any temporary building heaters in theroom 2 operate with the higher operating efficiency, the higher the temperature of the replacement air coming to them is. - The
apparatus 1 comprises fastening means 18, with which the air receive duct 4 can be detachably and substantially air-tightly fastened to the vent of the low-pressure purification device 17. Thanks to the fastening means 18, theapparatus 1 and low-pressure purification device 17 can be moved and transported separately and only connected to each other in theroom 2. To move the apparatus, it can be equipped withwheels 20. If necessary, the low-pressureair purification device 17 can also be used without theapparatus 1. - The
second air vent 7 of theapparatus 1 is equipped with a pipe output fitting 19 that is dimensioned for connection to any generally used ventilation pipe. This way, the air in theair vent 7 can be conveyed away from theapparatus 1. According to an idea, thesecond air vent 7 is connected to anormal ventilation duct 21 of theroom 2, which is isolated from the ventilation machine of the room by plugging, for instance. This way, the heat of the return air and the pressure equalization gain can be evenly distributed in theroom 2, which is advantageous in large and multiform rooms, in particular. Another advantage may be derived from the fact that the ventilation ducts of theroom 2 can be kept under overpressure all the time, in which case any dust caused by an operation in theroom 2 will not enter the ventilation ducts. -
Figure 2 is a schematic representation of a second apparatus and method for adjusting the air pressure of a room. - The principle of the
apparatus 1 and method does not differ per se from what is shown inFigure 1 , but now theair filter unit 15 andfan 16 are accommodated in the same shell with theair distribution casing 5. This way, theapparatus 1 forms an assembly that is capable of independent operation, can be used to adjust the pressure difference between theroom 2 and its surroundings and purifies the air in theroom 2. -
Heat recovery 22, with which thermal energy is recovered from the air removed from theroom 2, can be arranged in thefirst air vent 5. This thermal energy can be utilized in heating the air flowing in thesecond air vent 7, for instance. It should be noted thatheat recovery 22 can also be arranged in the apparatus shown inFigure 1 and those described in its description. - In some cases, features disclosed in this application may be used as such, regardless of other features. On the other hand, when necessary, features disclosed in this application may be combined in order to provide different combinations.
- In summary, the apparatus of the invention is characterised in that it comprises an air receive duct that is arranged to receive air from the room, an air distribution casing connected to the receive duct, first and second air vents connected to the air distribution casing and arranged to convey air coming from the receive duct out of the apparatus, and a control means arranged to adjust the flow resistance of the second air vent in relation to that of the first air vent.
- Further, it can be noted that the method of the invention is characterised by connecting the air receive duct to receive air from the room, conveying air from the receive duct to the air distribution casing, conveying a first part of the air from the air distribution casing to the first air vent and through it out of the room, and conveying a second part of the air from the air distribution casing to the second air vent and through it back to the room, and adjusting the flow resistance of the second air vent in relation to that of the first air vent.
- The drawings and the related description are only intended to illustrate the idea of the invention. It is apparent to a person skilled in the art that the invention is not restricted to the embodiments described above, in which the invention is described by means of some examples, but many modifications and different embodiments of the invention are possible within the scope of the inventive idea defined in the following claims.
-
- 1
- apparatus
- 2
- room
- 3
- air tight boundary
- 4
- air receive duct
- 5
- air distribution casing
- 6
- first air vent
- 7
- second air vent
- 8
- control means
- 9
- control plate
- 10
- element reducing motion sensitivity
- 11
- control unit
- 12
- pressure difference sensor
- 13
- heating device
- 14
- electric resistor
- 15
- air filter unit
- 16
- fan
- 17
- low-pressure air purification device
- 18
- fastening means
- 19
- pipe output fitting
- 20
- wheel
- 21
- room ventilation duct
- 22
- heat recovery
Claims (11)
- An apparatus for adjusting the air pressure of a room comprising
an air receive duct (4) arranged to receive air from the room (2).
an air distribution casing (5) connected to the receive duct (4),
first and second air vents (6, 7) connected to the air distribution casing (5) and arranged to convey air coming from the receive duct (4) out of the apparatus (1), and
the second air vent (7) is arranged to return air to the same room (2),
the first air vent (6) is arranged to convey air outside the room (2), characterised in that the apparatus comprises a control means (8) arranged to adjust the flow resistance of the second air vent (7) in relation to that of the first air vent (6),
that the control means (8) comprises air flow control means in connection with the second air vent (7) to adjust the flow resistance, and
that the control means (8) is connected to be controlled by a control unit (11) and that the control unit (11) is connected to a pressure difference sensor (12) detecting the pressure difference in the room (2) and its surroundings. - An apparatus as claimed in claim 1, characterised in that the control means (8) comprises a control plate (9) that is fastened turnably to the air distribution casing (5) to be turnable in front of the second air vent (7).
- An apparatus as claimed in any one of the preceding claims, characterised in that the second air vent (7) comprises a heater (13) for heating the flowing air.
- An apparatus as claimed in claim 3, characterised in that the heater (13) comprises an electric resistor (14).
- An apparatus as claimed in any one of the preceding claims, characterised in that it comprises an air filter unit (15) that is arranged in front of the air receive duct (4) in the flow direction, and a fan (16) that is arranged to generate the air flow flowing through the apparatus (1).
- An apparatus as claimed in claim 5, characterised in that the air filter unit (15) and fan (16) are arranged in the low-pressure air purification device (17) and that the apparatus (1) comprises fastening means (18) for fastening the air receive duct (4) detachably and substantially air-tightly to the low-pressure air purification device (17).
- An apparatus as claimed in any one of the preceding claims, characterised in that the second air vent (7) is equipped with a pipe output fitting (19) that is connectable to the air channel for conveying air away from the air distribution casing (5).
- An apparatus as claimed in any one of the preceding claims, characterised in that heat recovery (22) is arranged in the first air vent (6).
- A method for adjusting the air pressure of a room, the method comprising:connecting an air receive duct (4) to receive air from the room (2),conveying air from the air receive duct (4) to an air distribution casing (5),conveying a first part of the air from the air distribution casing (5) to a first air vent (6) and through it away from said room (2),conveying a second part of the air from the air distribution casing (5) to a second air vent (7) and through it back to said room (2), andadjusting the flow resistance of the second air vent (7) in relation to the flow resistance of the first air vent (6)conveying the first part of the air from the air distribution casing (5) through the first air vent (6) away from said room (2), characterised byadjusting the flow resistance by adjusting air flow control means in connection with the second air vent (7), andcontrolling the air flow control means with a control unit (11) by means of a pressure difference sensor (12) detecting the pressure difference in the room (2) and its surroundings.
- A method as claimed in of claim 9, comprising heating the air flowing through the second air vent (7).
- A method as claimed in any one of claims 9 to 11, comprising conveying air first to an air filter unit (15) for purification and the purified air then to the receive duct (4).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20126303A FI125673B (en) | 2012-12-13 | 2012-12-13 | Apparatus and method for controlling the air pressure in a room space |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2743598A2 EP2743598A2 (en) | 2014-06-18 |
EP2743598A3 EP2743598A3 (en) | 2018-04-04 |
EP2743598B1 true EP2743598B1 (en) | 2020-10-21 |
Family
ID=49911124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP13196151.8A Active EP2743598B1 (en) | 2012-12-13 | 2013-12-09 | Apparatus and method for adjusting air pressure of room |
Country Status (4)
Country | Link |
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US (1) | US20140170953A1 (en) |
EP (1) | EP2743598B1 (en) |
CA (1) | CA2836170A1 (en) |
FI (1) | FI125673B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6721241B2 (en) * | 2017-03-01 | 2020-07-08 | 株式会社イシダ | Goods sorting system |
KR102145359B1 (en) * | 2020-01-02 | 2020-08-28 | (주) 한독크린텍 | Cabin filter unit |
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JPS63238350A (en) * | 1987-03-25 | 1988-10-04 | Hitachi Ltd | Indoor negative pressure control system |
US4841733A (en) * | 1988-01-07 | 1989-06-27 | Dussault David R | Dri-Pc humidity and temperature controller |
GB2260793A (en) * | 1991-10-23 | 1993-04-28 | Colt Int Licensing | Apparatus for braking a member, particularly an opening ventilator flap biased to one of two positions |
JP2001020547A (en) * | 1999-07-12 | 2001-01-23 | Aiken Kogyo Kk | Smoking room with air cleaner |
US7059536B2 (en) * | 2002-07-19 | 2006-06-13 | Mestek, Inc. | Air circulation system |
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US8326464B2 (en) * | 2008-08-29 | 2012-12-04 | Trane International Inc. | Return fan control system and method |
JP5859960B2 (en) * | 2009-07-17 | 2016-02-16 | テクニカル ユニバーシティ オブ デンマークTechnical University Of Denmark | Devices and methods for reducing the spread of microorganisms and health hazards in the air and / or for protecting against microorganisms and health hazards in the air |
WO2011063144A1 (en) * | 2009-11-19 | 2011-05-26 | Fipak Research And Development Company | Method and apparatus for operating ducted fumehoods with increased energy efficiency |
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2012
- 2012-12-13 FI FI20126303A patent/FI125673B/en active IP Right Grant
-
2013
- 2013-12-09 EP EP13196151.8A patent/EP2743598B1/en active Active
- 2013-12-10 CA CA2836170A patent/CA2836170A1/en not_active Abandoned
- 2013-12-13 US US14/105,401 patent/US20140170953A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
CA2836170A1 (en) | 2014-06-13 |
US20140170953A1 (en) | 2014-06-19 |
EP2743598A2 (en) | 2014-06-18 |
EP2743598A3 (en) | 2018-04-04 |
FI125673B (en) | 2016-01-15 |
FI20126303A (en) | 2014-06-14 |
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